Park Tool Multi-Tool Material: [side plates] forged aluminum, [tools] hardened steel Hex Wrench: [MT-10, MT-20] 3, 4, 5, 8mm hex wrenches, [MT-30, MT-40] 2.5, 3, 4, 5, 6, 8mm hex wrenches Claimed Weight: [MT-10] 76 g, [MT-20] 95 g, MT-30] 153 g, [MT-40] 243 g Recommended Use: bike maintenance and repair Manufacturer Warranty: limited lifetime